Don I know the effects that lead has with blocking sound, but I don't think it is a wise solution to put it on a sports car or any other light car. The material you are talking about was meant to be used in RV's, buses, trucks, ect to minimize the amount of noise from the deisel engine and or electric generators. These trucks can handle the extra weight that the lead sheets would add. Adding lead sheets as a sound barrier to block road noise on a car in my opinion is not a good idea. I understand that you want to stop road noise, but it isn't that loud that it would warrant the use of a lead foil? I am one to look for lightening the car....not adding pounds to it. I think that good neoprene type sound barriers work very well to dampen the road noise when placed under the carpet of the vehicle and safer! You have to cut the lead sheets to size and depending on how it is cut will create lead dust...dangerous to your health for a regular DIY. Also when applying the neoprene sound barrier I suggest not to just drop it in and throw your carpet back down, I would advise in using adhesive to glue the mat down to the fiberglass floor so that the mat dosen't buckle and create little "chambers" between the mat and fiberglass. Also it will keep the mat from moving around under the crapet. In any rate...I am just posting my opinion and it is up the the owner of their car to decide what he/she would want to put into it. Steve --- In dmcnews@xxxxxxxxxxx, "Don Ekhoff" <ekhoff@xxxx> wrote: > Steve, > > The lead foil/damping foam material is pound for pound a very effective > solution. The lead will not pass airborn sound energy because it is non > pourous and limp. Any energy hitting it and causing it to vibrate is > absorbed by the associated foam. The reason I started this thread was to > see if someone had done their homework and was marketing a kit. In the name > of performance (of both kinds) I will take high tech lead foil based > products any day. > > Don > > FYI; I spray undercoated the entire underside of one of my D's and could > tell little or no difference in the amount of road noise that we are all > familiar with. It needs to be thick and sorta foamy to be effective and > Ziebart and such is this and really only for corrosion (although they > advertise for more). > > > ----- Original Message ----- > From: "Steve Rubano" <srubano@xxxx> > To: <dmcnews@xxxxxxxxxxx> > Sent: Monday, December 18, 2000 7:35 AM > Subject: [DML] Re: Re Road Noises > > > > Lead?! Why would anyone want to use lead for a sound barrier on the D > > or any car for that fact!! You know how much weight you would add to > > the car? That would cause the car to have LESS performance (slower, > > crappy gas milege..etc) which is something you don't want. You could > > also damage your engine and/or tranny with the added weight by making > > them work harder than they should be. >SNIP<